Weather & Climate in Dumont, IA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Dumont experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 16°F in January while summers reach 73°F in July. Annual precipitation totals 35.8 inches. The area receives 31.6 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 1,009 feet.
Temperature
16°F Jan (-9°C)
73°F Jul (23°C)
| Annual Average | 46.7°F |
| 14% below US avg | |
| January Average | 16°F (-9°C) |
| July Average | 73°F (23°C) |
Geography
| Elevation | 1,009 ft (308 m) |
| Area | 1.8 sq mi (4.6 km²) |
| Population Density | 474/sq mi |
| Coordinates | 42.7522°N, 92.9737°W |
| Timezone | America/Chicago |
| County | Butler County County |
| Nearest Airport | Northeast Iowa Regional (CCY) 29 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 27.1 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 89.4 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tornado History
658 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 51 fatalities, 1,207 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 25, 2008 | EF5 | 24 km | 41.0 mi | 9 |
| May 15, 1968 | EF5 | 12 km | 62.1 mi | 13 |
| May 15, 1968 | EF5 | 86 km | 13.1 mi | 5 |
| Oct 14, 1966 | EF5 | 56 km | 9.7 mi | 6 |
| May 30, 1989 | EF4 | 55 km | 11.0 mi | 0 |
| May 24, 1989 | EF4 | 91 km | 66.0 mi | 0 |
| May 4, 1977 | EF4 | 99 km | 2.0 mi | 0 |
| Jul 12, 1971 | EF4 | 68 km | 10.9 mi | 0 |
| Apr 30, 1967 | EF4 | 63 km | 13.3 mi | 0 |
| Apr 30, 1967 | EF4 | 79 km | 7.6 mi | 0 |
| Apr 30, 1967 | EF4 | 98 km | 38.7 mi | 5 |
| Aug 26, 1965 | EF4 | 81 km | 4.7 mi | 1 |
| May 5, 1965 | EF4 | 60 km | 41.6 mi | 0 |
| Sep 1, 1961 | EF4 | 4 km | 26.6 mi | 0 |
| May 10, 1953 | EF4 | 57 km | 26.6 mi | 0 |
| May 10, 1953 | EF4 | 91 km | 162.0 mi | 2 |
| Jul 19, 2018 | EF3 | 75 km | 8.4 mi | 0 |
| Jun 12, 2013 | EF3 | 60 km | 6.2 mi | 0 |
| May 25, 2008 | EF3 | 80 km | 32.0 mi | 0 |
| Jun 11, 2004 | EF3 | 80 km | 12.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 16°F (-9°C) | 1.0 in | Coldest, Driest |
| February | 21°F (-6°C) | 1.0 in | |
| March | 34°F (1°C) | 1.8 in | |
| April | 47°F (8°C) | 3.6 in | |
| May | 59°F (15°C) | 4.9 in | |
| June | 70°F (21°C) | 5.8 in | Wettest |
| July | 73°F (23°C) | 4.2 in | Warmest |
| August | 70°F (21°C) | 4.1 in | |
| September | 63°F (17°C) | 3.7 in | |
| October | 50°F (10°C) | 2.5 in | |
| November | 35°F (2°C) | 1.8 in | |
| December | 23°F (-5°C) | 1.3 in |
Dumont has a seasonal temperature swing of 57°F / from 16°F in January to 73°F in July. Total annual precipitation is 35.8 inches, with June being the wettest month (5.8") and January the driest (1.0").